Core/Misc: Modernize comparison operators

(cherry picked from commit f0a862e71bc12d86a898901ef773475a7c964832)

2 files changed, 11 insertions, 6 deletions

diff --git a/src/common/Cryptography/BigNumber.cpp b/src/common/Cryptography/BigNumber.cpp
index 62e459c6dce..35bfc91224d 100644
--- a/src/common/Cryptography/BigNumber.cpp
+++ b/src/common/Cryptography/BigNumber.cpp
@@ -146,7 +146,7 @@ BigNumber& BigNumber::operator<<=(int n)
     return *this;
 }
 
-int BigNumber::CompareTo(BigNumber const& bn) const
+int32 BigNumber::CompareTo(BigNumber const& bn) const
 {
     return BN_cmp(_bn, bn._bn);
 }
diff --git a/src/common/Cryptography/BigNumber.h b/src/common/Cryptography/BigNumber.h
index e61a8073c31..bbe2bebb42d 100644
--- a/src/common/Cryptography/BigNumber.h
+++ b/src/common/Cryptography/BigNumber.h
@@ -94,12 +94,17 @@ class TC_COMMON_API BigNumber
             return t <<= n;
         }
 
-        int CompareTo(BigNumber const& bn) const;
-        bool operator<=(BigNumber const& bn) const { return (CompareTo(bn) <= 0); }
+        int32 CompareTo(BigNumber const& bn) const;
         bool operator==(BigNumber const& bn) const { return (CompareTo(bn) == 0); }
-        bool operator>=(BigNumber const& bn) const { return (CompareTo(bn) >= 0); }
-        bool operator<(BigNumber const& bn) const { return (CompareTo(bn) < 0); }
-        bool operator>(BigNumber const& bn) const { return (CompareTo(bn) > 0); }
+        std::strong_ordering operator<=>(BigNumber const& other) const
+        {
+            int32 cmp = CompareTo(other);
+            if (cmp < 0)
+                return std::strong_ordering::less;
+            if (cmp > 0)
+                return std::strong_ordering::greater;
+            return std::strong_ordering::equal;
+        }
 
         bool IsZero() const;
         bool IsNegative() const;